Yeah, it sucks. But once it gets in your head, it isn't gonna leave you alone. To the tune of "Kids in America" by whoever sang it most recently.

Looking out a Gryffindor window
Down below the dog in the forest goes rushin' back
I'd never guess that its name is Black

Get to the Tower, nobody's moving
Seems the Fat Lady's disappeared, completely gone
Her refusal to Black turned his anger on

Downstairs everyone is churning
Downstairs our teacher is turning

We're the students in Gryffindor
We're the students in Gryffindor
Everybody fear the Dementors around

Brave words, the knight takes her place now
Password's switching every other day, confusing
The list's lost from poor Neville's bumbling

Hot-shot, give him the password
Without it, he cannot let you through, no he can't
But with it he will start another rant

Padfoot cuts through Weasley's curtain
Padfoot scares him, that is certain

We're the students in Gryffindor
We're the students in Gryffindor
Everybody fear the Dementors around

Get farther, werewolf, that's better
You were friends with my father, you can prove it to me
There must be a way you can make me see

Outside we're itching to save you
Outside we're itching to wave Dementors away
Expecto Patronum, now

My soul is saved by just a hair
Did I see my father over there?

We're the students in Gryffindor
We're the students in Gryffindor
Everybody fear the Dementors around

We're the kids
We're the kids
We're the students in Gryffindor… x3